Journal of Industrial and Engineering Chemistry, Vol.19, No.6, 1903-1909, November, 2013
Physical-chemical property and activity evaluation of LaB0.5Co0.5O3 (B = Cr, Mn, Cu) and LaMnxCo1-xO3 (x = 0.1, 0.25, 0.5) nano perovskites in VOC combustion
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The correlation between physical-chemical properties and activities of LaB0.5Co0.5O3 (B = Cr, Mn, Cu) nano perovskites was studied in combustion of toluene. LaMn0.5Co0.5O3 showed the highest activity among LaB0.5Co0.5O3 catalysts and further optimization study was focused on LaMnxCo1-xO3 (x = 0.1, 0.25, 0.5). The activity and reducibility of catalysts improved due to partial substitution of Co3+ by B cation. No direct relationship was between surface area and catalyst activity. T50% of 2-propanol over LaMn0.25Co0.75O3, LaMn0.5Co0.5O3, LaMn0.1Co0.9O3 and LaCoO3 was 168, 200, 220 and 229 ℃, respectively. LaMn0.25Co0.75O3 was the optimum catalyst and showed robust stability in combustion of toluene and 2-propanol.
Keywords:LaB0.5Co0.5O3 perovskite;Sol-gel auto combustion;Nano mixed oxides;Volatile organic compounds;TPR
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